FPS drops every few minutes. Help

[MrBossSauce]

I have been having bizarre FPS drops since a few weeks ago. I've been playing the game Warframe for over a year now, and never had this problem before. When i load up a mission, i usually get above 90-100 frames, and i do get those frames still. But every other minute or so, the fps will drop like 50-60 frames when in a mission. The frames go back to 100+ after like 1-2min. i have screenshots of me in the main ship/main menu where you're supposed to get a lot of frames since it isn't loading much, and it is playing at 314 fps and suddenly drops to 174. In game that means i go from 100+ to unplayable frames. The frames do come back eventually, but i dont know why the are dropping. I haven't OC'd and i have tried things like turning off Cool n' quiet, but nothing has worked. These drops happen regardless of my settings as well. I could be playing on everything at its lowest, getting insane FPS, but then it still drops anyway. I'll put my specs below. Thank you for your time.

Screenshots:
314fps- http://i.imgur.com/gnilYGg.jpg
174fps- http://i.imgur.com/YeBCjds.jpg

Specs:
CASE:CyberPowerPC X-Titan 100 MID-Tower Gaming Case w/ Side-Window Panel
CPU:AMD FX-8320 3.50 GHz Eight-Core AM3+ CPU 6MB L2 Cache & Turbo Core Technology
CS_FAN:Maximum 120MM Color Case Cooling Fans for your selected case
MEMORY:8GB (4GBx2) DDR3/1866MHz Dual Channel Memory
MOTHERBOARD:ASUS M5A97 LE R2.0 AMD 970 ATX w/ GbLAN, 2 Gen2 PCIe x16, 2 PCIe x1, 2 PCI
VIDEO:EVGA Superclocked NVIDIA GeForce GTX 770 2GB GDDR5 w/ ACX Cooling PCIe 3.0 x16 Video Card
POWERSUPPLY:650 Watts - Thermaltake SMART Series SP-650PCBUS 80 PLUS BRONZE Certified Active PFC Power Supply
FAN:Cooler Master Seidon 120M Liquid Cooling CPU Cooler - Enhance Cooling Performance (Dual Standard 120MM Fans (Push-Pull)
HDD:1TB Western Digital Caviar Blue SATA-III 6.0Gb/s 7200 RPM HDD

 

[davidarad02]

re-install your GPU driver.

 

[MrBossSauce]

Everything says i should uninstall my old drivers, but when i go to control panel, there isn't any " NVIDIA Windows Display Drivers" on the list. just 3d vision controller drivers and audio drivers.

 

[kripat-96]

Get the tool DDU from http://www.guru3d.com/files-details/display-driver-uninstaller-download.html;
The tool will clear any drivers from your pc, and then re download GeForce Experience to get clean drivers